Event: Morecambe Open

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Opponent Rating Result
John Marshall 1510 1 - 0
John D Lyth 1868 0 - 1
John D Lyth 1868 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1749 = (5246 + 400 * (1 - 1)) / 3)

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